diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 78a5cdd..2cc076f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -11,8 +11,8 @@ env:
   CIBW_ENVIRONMENT_LINUX: '
       USEOPENMP=0
       CFLAGS="-std=c99"
-      PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/project/cfitsio-3.49/lib/pkgconfig
-      LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/project/cfitsio-3.49/lib'
+      PKG_CONFIG_PATH=$PKG_CONFIG_PATH:/project/cfitsio-4.3.0/lib/pkgconfig
+      LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/project/cfitsio-4.3.0/lib'
   CIBW_ENVIRONMENT_MACOS: 'CFLAGS="-std=c99"'
   CIBW_TEST_REQUIRES: 'pytest numpy==1.19.5'
   CIBW_TEST_COMMAND: 'pytest $(dirname $(python -c "import mpdaf; print(mpdaf.__file__)"))'
diff --git a/build-deps.sh b/build-deps.sh
index 79c28ec..6a65a34 100644
--- a/build-deps.sh
+++ b/build-deps.sh
@@ -6,8 +6,8 @@ set -e
 # pip install -U Cython
 
 echo "# Downloading cfitsio"
-curl https://heasarc.gsfc.nasa.gov/FTP/software/fitsio/c/cfitsio-3.49.tar.gz | tar xz
+curl https://heasarc.gsfc.nasa.gov/FTP/software/fitsio/c/cfitsio-4.3.0.tar.gz | tar xz
 echo "# Installing cfitsio"
-cd cfitsio-3.49
+cd cfitsio-4.3.0
 ./configure && make clean shared install
 cd ..